Shaker for mixing amalgams



June 14, 1955 M. VLOCK SHAKER FOR MIXING AMALGAMS 2 Sheets-Sheet 1 Filed Feb. 11, 1953 MARK INVENTOR. VZOCK June 14, 1955 M. VLOCK SHAKER FOR MIXING AMALGAMS 2 Sheets-Sheet 2 Filed Feb. 11, 1953 INVENTOR. MEX 7106K United States Patent SHAKER FOR MIXING AMALGAMS Mark Vlock, Bronx, N. Y.

Application February 11, 1953, Serial No. 336,331

4 Claims. (Cl. 259-75) This invention relates to a reciprocatory shaker for mixing small quantities of amalgams for use in filling teeth.

An object of the invention is to provide a reciprocatory shaker in the form of an attachment adapted to be applied to the arm of a dentists drilling unit having an endless belt for rotating the drills and which shaker includes a pivoted arm having a grooved wheel adapted to be swung into engagement with the belt for imparting reciprocatory movement to a removable receptacle for containing the amalgams for mixing the same and in which the pivotal arm together with the parts connected therewith are movable to an out-of-the-way position when not in use.

Still another object of the invention is to provide a reciprocatory shaker of said character having means for lengthening the stroke or reciprocatory movement of the shaker arm.

Still another object of the invention is to provide a reciprocatory shaker having a wheel for tensioning the belt against the driving wheel.

With the foregoing and other objects in view, reference is now made to the following specification and accompanying drawings in which the preferred embodiment of the invention is illustrated.

In the drawings:

Fig. 1 is a view in elevation of a reciprocatory shaker constructed in accordance with the invention and illustrating the same in operative position on the arm of a dentists drilling unit which is fragmentarily illustrated.

Fig. 2 is a vertical sectional view taken approximately on line 22 of Fig. 1.

Fig. 3 is a horizontal sectional view taken approximately on line 3-3 of Fig. 1.

Fig. 4 is a rear view of the reciprocatory shaker shown in operative position on the arm of a dentists drilling unit.-

Fig. 5 is a view similar to Fig. 1, with the operating parts moved to an out-of-the-way position.

Fig. 6 is a sectional view taken approximately on line 6-6 of Fig. 1.

Fig. 7 is a sectional view taken approximately on line 7-7 of Fig. 1.

Fig. 8 is a sectional view taken approximately on line 83 of Fig. 1.

Fig. 9 is a view in elevation of the receptacle for con taining the amalgams with the parts shown in separated juxtaposition.

Referring to the drawings by characters of reference, the shaker is in the form of an attachment adapted to be afiixed to the outwardly extending arm of a dentists drilling unit so as to dispose the attachment in convenient position for use by the dentist and which may be used to mix the amalgam required for the filling of one or more teeth while the dentist is engaged in drilling or treating the teeth. For this purpose, the shaker includes a flat bar 10 to which a clamping plate 11 is removably secured by screws 12 and which bar and plate have confronting recesses which together form substantially circular openings 14 for clampingly engaging the top and bottom bars B of the drilling unit. Tightening of the screws 12 effects a tightening of the plate 11 against the bar 10 to thereby secure the attachment to the said arm.

Pivoted to the upper end of the bar 10 on a pin 16 is an arm 17 having swinging movement from an out-ofthe-Way position above the bar 10 to a position in alignment therewith. The bar 10 is provided with a lug 18 which forms a stop for limiting the swinging movement of the arm and for retaining the same in the out-of-theway position. The arm 17 is spaced from the bar 10 by means of blocks 19 and 20 located adjacent the upper and lower ends thereof. The pin 16 pivoting the arm 17 to the bar 10 extends freely through the block 19 and is threadedly engaged at its outer end in the bar 10. The arm 17 is formed with a recess 21 which is adapted to receive the shank of a tightening screw 22 threadedly engaged in the block 20. Tightening of the screw 22 secures the arm 17 in fixed parallel relation with the bar 10 with a space therebetween intermediate the blocks 19 and 20.

Pivotally mounted on the outer end of the arm 17 on a pivot pin 23 is a shaker arm 24 having a member 25 afiixed to the outer free end thereof and which forms a socket for holding a receptacle 26. The receptacle 26 is adapted to contain a slug 27 providing a hammer or pestle 24 by means of a grooved wheel 29 mounted for rotation on a shaft 3% affixed to the arm 17 and which projects inwardly to dispose the grooved wheel 29 between the arm and the bar for free turning movement. The grooved wheel 29 is formed with a cylindrical eccentric hub 31 upon which is mounted a cam follower 32 having a cylindrical peripheral inner face 33 in engagement with the cylindrical face of the eccentric hub 31. The cam follower 32 is provided with a connecting link 34 which is adjustably secured at its free end to the shaker arm 24 by means of a clamping screw 35 having a shank 36 engaging through a slot 37 in the shaker arm and which clamping screw 35 is adapted to be adjusted toward and away from the pivot pin 23 and secured in adjusted position for varying the length of the stroke imparted to the outer end of the shaker arm by the rotation of the grooved Wheel. A peripherally grooved belt tightening wheel 39 is mounetd for free turning movement on a shaft 40 secured in an opening in a projection 41 formed integrally with and projecting laterally from the bar 10 to dispose the wheel in alignment with the grooved wheel 29. The tightening wheel 39 is relatively smaller than the grooved wheel 29 and is disposed in advance thereof.

The drilling unit is of the type having an endless belt C for rotating the shaft (not shown) in which the drills are inserted. The belt C has a driving lead D and a return lead E which travel in the direction of the arrows indicated in Figs. 1, 3, 4 and 5 of the drawings and are located on opposite sides of the bars B. The lead D of the belt C is trained over the upper peripheral portion of the tightening wheel 39 and thence under the grooved wheel 29, whereby the tightening wheel 37 in addition to taking up slack in the belt C so as to tension the lead D against the wheel 29, places a greater portion of the wheel 29 in engagement with the said lead.

The receptacle 26 is of cylindrical formation, as illustrated more particularly in Figs. 8 and 9 of the drawings, and includes a cap 42 which is frictionally fitted over the truncated upper end of the body thereof. The member 25 includes a cylindrical portion 43 afiixed to a spring strap 44 having an end 45 disposed in spaced relation from the cylindrical portion and which is adapted to receive the receptacle 26 with one end disposed in the cy- 3 lindrical portion 43 and the opposite end resiliently engaged against the end 45.

While the invention is illustrated in the drawings and described in the specification in connection with the preferred form thereof, it is to be understood that the same is not so limited and shall cover and include all modifications and forms thereof which fall within the scope of the invention.

What is claimed is:

1. In an attachment to a dentists drilling unit having an arm including spaced bars and an endless driving belt arranged with one of the courses of said belt located adjacent said bars, said attachment including clamping plates disposed on opposite sides of said bars and clampingly engaging said bars therebetween for securing the attachment to the arm of said drilling unit, a swingable arm pivoted at its upper end to one of said plates in spaced relation therewith, said swingable arm and plate having interengageable means at the lower ends thereof for securing said arm in parallel relation with said plate, a grooved wheel having an eccentric hub pivoted to said swingable arm to dispose said wheel between the arm and said last mentioned plate and in engagement with said course of the driving belt, a shaker arm pivotally connected to said swingable arm at its lower end, a member mounted on the free end of said shaker arm providing a socket adapted to hold a receptable for containing metals to be mixed to provide an amalgam, a cam follower engaging said eccentric hub and having a link connected with said shaker arm intermediate the ends thereof for imparting reciprocatory movement to the outer end of said shaker arm with the rotation of said grooved wheel by the movement of said endless belt, a lug projecting outwardly at the upper end of said last mentioned plate, and said swingable arm being movable on its pivotal connection with said last mentioned plate to a position in engagement with said lug and above said bars when the lower end of said arm is released from latched engagement on said first mentioned plate.

2. In an attachment to a dentists drilling unit having an arm and an endless driving belt arranged with one of the courses of said belt located adjacent to and parallel with said arm, said attachment including a plate affixed to said arm, a swingable arm pivoted at its upper end to said plate in spaced relation therewith intermediate the ends thereof, a grooved wheel having an eccentric hub pivoted to said swingable arm to dispose said wheel be tween said arm and said plate and in engagement with said course of the driving belt, a shaker arm pivotally connected to said swingable arm at one end thereof, a member mounted on the free end of said shaker arm providing a socket adapted to hold a receptacle for containing materials to be mixed, a cam follower engaging said eccentric hub and having a link connected with said shaker arm intermediate the ends thereof for imparting reciprocatory movement to the outer end of said shaker arm with the rotation of said grooved wheel by the move ment of said endless belt, a lug projecting outwardly at the upper end of said plate, and said swingable arm being movable on its pivotal connection with said plate to an inoperative position in engagement with said lug.

3. In an attachment to a dentists drilling unit having an arm and an endless driving belt arranged with one of the courses of said belt located adjacent to and parallel with said arm, said attachment including a plate affixed to said arm, a swingable arm pivoted at its upper end to said plate in spaced relation therewith intermediate the ends thereof, a grooved wheel having an eccentric hub pivoted to said swingable arm to dispose said wheel between said arm and said plate and in engagement with said course of the driving belt, a shaker arm pivotally connected to said swingable arm at one end thereof, a member mounted on the free end of said shaker arm providing a socket adapted to hold a receptacle for containing materials to be mixed, a cam follower engaging said eccentric hub and having a link connected with said shaker arm intermediate the ends thereof for imparting reciprocatory movement to the outer end of said shaker arm with the rotation of said grooved wheel by the movement of said endless belt, a lug projecting outwardly at the upper end of said plate, said swingable arm being movable on its pivotal connection with said plate to an in-- operative position in engagement with said lug, and a grooved wheel mounted for free turning movement on said plate in alignment with said first mentioned grooved wheel and adapted to engage said course of the driving belt for tightening the same against said first mentioned grooved wheel.

4. In an attachment for use with a dentists drilling unit having an arm and an endless driving belt arranged with a course of said belt extending longitudinally of said arm, said attachment including a support adapted to be mounted on said arm, a swinging arm, a wheel having an eccentric hub pivoted to said swinging arm, a shaker arm pivoted to said swinging arm, a member mounted on the free end of said shaker arm providing a socket adapted to hold a receptacle for containing materials to be mixed to provide an amalgam, a cam follower engaging said eccentric hub and having a link connected with said shaker arm intermediate the ends thereof for imparting reciprocatory movement to the outer end of said shaker arm with the rotation of said wheel by the movement of said endless belt, and said swinging arm being pivoted to said support for movement from an operative position with the wheel disposed in engagement with said belt to an inoperative position with the wheel disposed out of engagement therewith, and interengageable means carried by said swinging arm and said support for releasably sccuring said swinging arm in operative position.

References Cited in the file of this patent UNITED STATES PATENTS Stevens Aug. 8, 1950 

